linux/drivers/video/platinumfb.c
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   1/*
   2 *  platinumfb.c -- frame buffer device for the PowerMac 'platinum' display
   3 *
   4 *  Copyright (C) 1998 Franz Sirl
   5 *
   6 *  Frame buffer structure from:
   7 *    drivers/video/controlfb.c -- frame buffer device for
   8 *    Apple 'control' display chip.
   9 *    Copyright (C) 1998 Dan Jacobowitz
  10 *
  11 *  Hardware information from:
  12 *    platinum.c: Console support for PowerMac "platinum" display adaptor.
  13 *    Copyright (C) 1996 Paul Mackerras and Mark Abene
  14 *
  15 *  This file is subject to the terms and conditions of the GNU General Public
  16 *  License. See the file COPYING in the main directory of this archive for
  17 *  more details.
  18 */
  19
  20#undef DEBUG
  21
  22#include <linux/module.h>
  23#include <linux/kernel.h>
  24#include <linux/errno.h>
  25#include <linux/string.h>
  26#include <linux/mm.h>
  27#include <linux/vmalloc.h>
  28#include <linux/delay.h>
  29#include <linux/interrupt.h>
  30#include <linux/fb.h>
  31#include <linux/init.h>
  32#include <linux/nvram.h>
  33#include <linux/of_device.h>
  34#include <linux/of_platform.h>
  35#include <asm/io.h>
  36#include <asm/prom.h>
  37#include <asm/pgtable.h>
  38
  39#include "macmodes.h"
  40#include "platinumfb.h"
  41
  42static int default_vmode = VMODE_NVRAM;
  43static int default_cmode = CMODE_NVRAM;
  44
  45struct fb_info_platinum {
  46        struct fb_info                  *info;
  47
  48        int                             vmode, cmode;
  49        int                             xres, yres;
  50        int                             vxres, vyres;
  51        int                             xoffset, yoffset;
  52
  53        struct {
  54                __u8 red, green, blue;
  55        }                               palette[256];
  56        u32                             pseudo_palette[16];
  57        
  58        volatile struct cmap_regs       __iomem *cmap_regs;
  59        unsigned long                   cmap_regs_phys;
  60        
  61        volatile struct platinum_regs   __iomem *platinum_regs;
  62        unsigned long                   platinum_regs_phys;
  63        
  64        __u8                            __iomem *frame_buffer;
  65        volatile __u8                   __iomem *base_frame_buffer;
  66        unsigned long                   frame_buffer_phys;
  67        
  68        unsigned long                   total_vram;
  69        int                             clktype;
  70        int                             dactype;
  71
  72        struct resource                 rsrc_fb, rsrc_reg;
  73};
  74
  75/*
  76 * Frame buffer device API
  77 */
  78
  79static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
  80        u_int transp, struct fb_info *info);
  81static int platinumfb_blank(int blank_mode, struct fb_info *info);
  82static int platinumfb_set_par (struct fb_info *info);
  83static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info);
  84
  85/*
  86 * internal functions
  87 */
  88
  89static inline int platinum_vram_reqd(int video_mode, int color_mode);
  90static int read_platinum_sense(struct fb_info_platinum *pinfo);
  91static void set_platinum_clock(struct fb_info_platinum *pinfo);
  92static void platinum_set_hardware(struct fb_info_platinum *pinfo);
  93static int platinum_var_to_par(struct fb_var_screeninfo *var,
  94                               struct fb_info_platinum *pinfo,
  95                               int check_only);
  96
  97/*
  98 * Interface used by the world
  99 */
 100
 101static struct fb_ops platinumfb_ops = {
 102        .owner =        THIS_MODULE,
 103        .fb_check_var   = platinumfb_check_var,
 104        .fb_set_par     = platinumfb_set_par,
 105        .fb_setcolreg   = platinumfb_setcolreg,
 106        .fb_blank       = platinumfb_blank,
 107        .fb_fillrect    = cfb_fillrect,
 108        .fb_copyarea    = cfb_copyarea,
 109        .fb_imageblit   = cfb_imageblit,
 110};
 111
 112/*
 113 * Checks a var structure
 114 */
 115static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info)
 116{
 117        return platinum_var_to_par(var, info->par, 1);
 118}
 119
 120/*
 121 * Applies current var to display
 122 */
 123static int platinumfb_set_par (struct fb_info *info)
 124{
 125        struct fb_info_platinum *pinfo = info->par;
 126        struct platinum_regvals *init;
 127        int err, offset = 0x20;
 128
 129        if((err = platinum_var_to_par(&info->var, pinfo, 0))) {
 130                printk (KERN_ERR "platinumfb_set_par: error calling"
 131                                 " platinum_var_to_par: %d.\n", err);
 132                return err;
 133        }
 134
 135        platinum_set_hardware(pinfo);
 136
 137        init = platinum_reg_init[pinfo->vmode-1];
 138        
 139        if ((pinfo->vmode == VMODE_832_624_75) && (pinfo->cmode > CMODE_8))
 140                offset = 0x10;
 141
 142        info->screen_base = pinfo->frame_buffer + init->fb_offset + offset;
 143        mutex_lock(&info->mm_lock);
 144        info->fix.smem_start = (pinfo->frame_buffer_phys) + init->fb_offset + offset;
 145        mutex_unlock(&info->mm_lock);
 146        info->fix.visual = (pinfo->cmode == CMODE_8) ?
 147                FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
 148        info->fix.line_length = vmode_attrs[pinfo->vmode-1].hres * (1<<pinfo->cmode)
 149                + offset;
 150        printk("line_length: %x\n", info->fix.line_length);
 151        return 0;
 152}
 153
 154static int platinumfb_blank(int blank,  struct fb_info *fb)
 155{
 156/*
 157 *  Blank the screen if blank_mode != 0, else unblank. If blank == NULL
 158 *  then the caller blanks by setting the CLUT (Color Look Up Table) to all
 159 *  black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due
 160 *  to e.g. a video mode which doesn't support it. Implements VESA suspend
 161 *  and powerdown modes on hardware that supports disabling hsync/vsync:
 162 *    blank_mode == 2: suspend vsync
 163 *    blank_mode == 3: suspend hsync
 164 *    blank_mode == 4: powerdown
 165 */
 166/* [danj] I think there's something fishy about those constants... */
 167/*
 168        struct fb_info_platinum *info = (struct fb_info_platinum *) fb;
 169        int     ctrl;
 170
 171        ctrl = ld_le32(&info->platinum_regs->ctrl.r) | 0x33;
 172        if (blank)
 173                --blank_mode;
 174        if (blank & VESA_VSYNC_SUSPEND)
 175                ctrl &= ~3;
 176        if (blank & VESA_HSYNC_SUSPEND)
 177                ctrl &= ~0x30;
 178        out_le32(&info->platinum_regs->ctrl.r, ctrl);
 179*/
 180/* TODO: Figure out how the heck to powerdown this thing! */
 181        return 0;
 182}
 183
 184static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 185                              u_int transp, struct fb_info *info)
 186{
 187        struct fb_info_platinum *pinfo = info->par;
 188        volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
 189
 190        if (regno > 255)
 191                return 1;
 192
 193        red >>= 8;
 194        green >>= 8;
 195        blue >>= 8;
 196
 197        pinfo->palette[regno].red = red;
 198        pinfo->palette[regno].green = green;
 199        pinfo->palette[regno].blue = blue;
 200
 201        out_8(&cmap_regs->addr, regno);         /* tell clut what addr to fill  */
 202        out_8(&cmap_regs->lut, red);            /* send one color channel at    */
 203        out_8(&cmap_regs->lut, green);          /* a time...                    */
 204        out_8(&cmap_regs->lut, blue);
 205
 206        if (regno < 16) {
 207                int i;
 208                u32 *pal = info->pseudo_palette;
 209                switch (pinfo->cmode) {
 210                case CMODE_16:
 211                        pal[regno] = (regno << 10) | (regno << 5) | regno;
 212                        break;
 213                case CMODE_32:
 214                        i = (regno << 8) | regno;
 215                        pal[regno] = (i << 16) | i;
 216                        break;
 217                }
 218        }
 219        
 220        return 0;
 221}
 222
 223static inline int platinum_vram_reqd(int video_mode, int color_mode)
 224{
 225        int baseval = vmode_attrs[video_mode-1].hres * (1<<color_mode);
 226
 227        if ((video_mode == VMODE_832_624_75) && (color_mode > CMODE_8))
 228                baseval += 0x10;
 229        else
 230                baseval += 0x20;
 231
 232        return vmode_attrs[video_mode-1].vres * baseval + 0x1000;
 233}
 234
 235#define STORE_D2(a, d) { \
 236        out_8(&cmap_regs->addr, (a+32)); \
 237        out_8(&cmap_regs->d2, (d)); \
 238}
 239
 240static void set_platinum_clock(struct fb_info_platinum *pinfo)
 241{
 242        volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
 243        struct platinum_regvals *init;
 244
 245        init = platinum_reg_init[pinfo->vmode-1];
 246
 247        STORE_D2(6, 0xc6);
 248        out_8(&cmap_regs->addr,3+32);
 249
 250        if (in_8(&cmap_regs->d2) == 2) {
 251                STORE_D2(7, init->clock_params[pinfo->clktype][0]);
 252                STORE_D2(8, init->clock_params[pinfo->clktype][1]);
 253                STORE_D2(3, 3);
 254        } else {
 255                STORE_D2(4, init->clock_params[pinfo->clktype][0]);
 256                STORE_D2(5, init->clock_params[pinfo->clktype][1]);
 257                STORE_D2(3, 2);
 258        }
 259
 260        __delay(5000);
 261        STORE_D2(9, 0xa6);
 262}
 263
 264
 265/* Now how about actually saying, Make it so! */
 266/* Some things in here probably don't need to be done each time. */
 267static void platinum_set_hardware(struct fb_info_platinum *pinfo)
 268{
 269        volatile struct platinum_regs   __iomem *platinum_regs = pinfo->platinum_regs;
 270        volatile struct cmap_regs       __iomem *cmap_regs = pinfo->cmap_regs;
 271        struct platinum_regvals         *init;
 272        int                             i;
 273        int                             vmode, cmode;
 274        
 275        vmode = pinfo->vmode;
 276        cmode = pinfo->cmode;
 277
 278        init = platinum_reg_init[vmode - 1];
 279
 280        /* Initialize display timing registers */
 281        out_be32(&platinum_regs->reg[24].r, 7); /* turn display off */
 282
 283        for (i = 0; i < 26; ++i)
 284                out_be32(&platinum_regs->reg[i+32].r, init->regs[i]);
 285
 286        out_be32(&platinum_regs->reg[26+32].r, (pinfo->total_vram == 0x100000 ?
 287                                                init->offset[cmode] + 4 - cmode :
 288                                                init->offset[cmode]));
 289        out_be32(&platinum_regs->reg[16].r, (unsigned) pinfo->frame_buffer_phys+init->fb_offset+0x10);
 290        out_be32(&platinum_regs->reg[18].r, init->pitch[cmode]);
 291        out_be32(&platinum_regs->reg[19].r, (pinfo->total_vram == 0x100000 ?
 292                                             init->mode[cmode+1] :
 293                                             init->mode[cmode]));
 294        out_be32(&platinum_regs->reg[20].r, (pinfo->total_vram == 0x100000 ? 0x11 : 0x1011));
 295        out_be32(&platinum_regs->reg[21].r, 0x100);
 296        out_be32(&platinum_regs->reg[22].r, 1);
 297        out_be32(&platinum_regs->reg[23].r, 1);
 298        out_be32(&platinum_regs->reg[26].r, 0xc00);
 299        out_be32(&platinum_regs->reg[27].r, 0x235);
 300        /* out_be32(&platinum_regs->reg[27].r, 0x2aa); */
 301
 302        STORE_D2(0, (pinfo->total_vram == 0x100000 ?
 303                     init->dacula_ctrl[cmode] & 0xf :
 304                     init->dacula_ctrl[cmode]));
 305        STORE_D2(1, 4);
 306        STORE_D2(2, 0);
 307
 308        set_platinum_clock(pinfo);
 309
 310        out_be32(&platinum_regs->reg[24].r, 0); /* turn display on */
 311}
 312
 313/*
 314 * Set misc info vars for this driver
 315 */
 316static void platinum_init_info(struct fb_info *info,
 317                               struct fb_info_platinum *pinfo)
 318{
 319        /* Fill fb_info */
 320        info->fbops = &platinumfb_ops;
 321        info->pseudo_palette = pinfo->pseudo_palette;
 322        info->flags = FBINFO_DEFAULT;
 323        info->screen_base = pinfo->frame_buffer + 0x20;
 324
 325        fb_alloc_cmap(&info->cmap, 256, 0);
 326
 327        /* Fill fix common fields */
 328        strcpy(info->fix.id, "platinum");
 329        info->fix.mmio_start = pinfo->platinum_regs_phys;
 330        info->fix.mmio_len = 0x1000;
 331        info->fix.type = FB_TYPE_PACKED_PIXELS;
 332        info->fix.smem_start = pinfo->frame_buffer_phys + 0x20; /* will be updated later */
 333        info->fix.smem_len = pinfo->total_vram - 0x20;
 334        info->fix.ywrapstep = 0;
 335        info->fix.xpanstep = 0;
 336        info->fix.ypanstep = 0;
 337        info->fix.type_aux = 0;
 338        info->fix.accel = FB_ACCEL_NONE;
 339}
 340
 341
 342static int platinum_init_fb(struct fb_info *info)
 343{
 344        struct fb_info_platinum *pinfo = info->par;
 345        struct fb_var_screeninfo var;
 346        int sense, rc;
 347
 348        sense = read_platinum_sense(pinfo);
 349        printk(KERN_INFO "platinumfb: Monitor sense value = 0x%x, ", sense);
 350        if (default_vmode == VMODE_NVRAM) {
 351#ifdef CONFIG_NVRAM
 352                default_vmode = nvram_read_byte(NV_VMODE);
 353                if (default_vmode <= 0 || default_vmode > VMODE_MAX ||
 354                    !platinum_reg_init[default_vmode-1])
 355#endif
 356                        default_vmode = VMODE_CHOOSE;
 357        }
 358        if (default_vmode == VMODE_CHOOSE) {
 359                default_vmode = mac_map_monitor_sense(sense);
 360        }
 361        if (default_vmode <= 0 || default_vmode > VMODE_MAX)
 362                default_vmode = VMODE_640_480_60;
 363#ifdef CONFIG_NVRAM
 364        if (default_cmode == CMODE_NVRAM)
 365                default_cmode = nvram_read_byte(NV_CMODE);
 366#endif
 367        if (default_cmode < CMODE_8 || default_cmode > CMODE_32)
 368                default_cmode = CMODE_8;
 369        /*
 370         * Reduce the pixel size if we don't have enough VRAM.
 371         */
 372        while(default_cmode > CMODE_8 &&
 373              platinum_vram_reqd(default_vmode, default_cmode) > pinfo->total_vram)
 374                default_cmode--;
 375
 376        printk("platinumfb:  Using video mode %d and color mode %d.\n", default_vmode, default_cmode);
 377
 378        /* Setup default var */
 379        if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
 380                /* This shouldn't happen! */
 381                printk("mac_vmode_to_var(%d, %d,) failed\n", default_vmode, default_cmode);
 382try_again:
 383                default_vmode = VMODE_640_480_60;
 384                default_cmode = CMODE_8;
 385                if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
 386                        printk(KERN_ERR "platinumfb: mac_vmode_to_var() failed\n");
 387                        return -ENXIO;
 388                }
 389        }
 390
 391        /* Initialize info structure */
 392        platinum_init_info(info, pinfo);
 393
 394        /* Apply default var */
 395        info->var = var;
 396        var.activate = FB_ACTIVATE_NOW;
 397        rc = fb_set_var(info, &var);
 398        if (rc && (default_vmode != VMODE_640_480_60 || default_cmode != CMODE_8))
 399                goto try_again;
 400
 401        /* Register with fbdev layer */
 402        rc = register_framebuffer(info);
 403        if (rc < 0)
 404                return rc;
 405
 406        printk(KERN_INFO "fb%d: Apple Platinum frame buffer device\n", info->node);
 407
 408        return 0;
 409}
 410
 411/*
 412 * Get the monitor sense value.
 413 * Note that this can be called before calibrate_delay,
 414 * so we can't use udelay.
 415 */
 416static int read_platinum_sense(struct fb_info_platinum *info)
 417{
 418        volatile struct platinum_regs __iomem *platinum_regs = info->platinum_regs;
 419        int sense;
 420
 421        out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
 422        __delay(2000);
 423        sense = (~in_be32(&platinum_regs->reg[23].r) & 7) << 8;
 424
 425        /* drive each sense line low in turn and collect the other 2 */
 426        out_be32(&platinum_regs->reg[23].r, 3); /* drive A low */
 427        __delay(2000);
 428        sense |= (~in_be32(&platinum_regs->reg[23].r) & 3) << 4;
 429        out_be32(&platinum_regs->reg[23].r, 5); /* drive B low */
 430        __delay(2000);
 431        sense |= (~in_be32(&platinum_regs->reg[23].r) & 4) << 1;
 432        sense |= (~in_be32(&platinum_regs->reg[23].r) & 1) << 2;
 433        out_be32(&platinum_regs->reg[23].r, 6); /* drive C low */
 434        __delay(2000);
 435        sense |= (~in_be32(&platinum_regs->reg[23].r) & 6) >> 1;
 436
 437        out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
 438
 439        return sense;
 440}
 441
 442/*
 443 * This routine takes a user-supplied var, and picks the best vmode/cmode from it.
 444 * It also updates the var structure to the actual mode data obtained
 445 */
 446static int platinum_var_to_par(struct fb_var_screeninfo *var, 
 447                               struct fb_info_platinum *pinfo,
 448                               int check_only)
 449{
 450        int vmode, cmode;
 451
 452        if (mac_var_to_vmode(var, &vmode, &cmode) != 0) {
 453                printk(KERN_ERR "platinum_var_to_par: mac_var_to_vmode unsuccessful.\n");
 454                printk(KERN_ERR "platinum_var_to_par: var->xres = %d\n", var->xres);
 455                printk(KERN_ERR "platinum_var_to_par: var->yres = %d\n", var->yres);
 456                printk(KERN_ERR "platinum_var_to_par: var->xres_virtual = %d\n", var->xres_virtual);
 457                printk(KERN_ERR "platinum_var_to_par: var->yres_virtual = %d\n", var->yres_virtual);
 458                printk(KERN_ERR "platinum_var_to_par: var->bits_per_pixel = %d\n", var->bits_per_pixel);
 459                printk(KERN_ERR "platinum_var_to_par: var->pixclock = %d\n", var->pixclock);
 460                printk(KERN_ERR "platinum_var_to_par: var->vmode = %d\n", var->vmode);
 461                return -EINVAL;
 462        }
 463
 464        if (!platinum_reg_init[vmode-1]) {
 465                printk(KERN_ERR "platinum_var_to_par, vmode %d not valid.\n", vmode);
 466                return -EINVAL;
 467        }
 468
 469        if (platinum_vram_reqd(vmode, cmode) > pinfo->total_vram) {
 470                printk(KERN_ERR "platinum_var_to_par, not enough ram for vmode %d, cmode %d.\n", vmode, cmode);
 471                return -EINVAL;
 472        }
 473
 474        if (mac_vmode_to_var(vmode, cmode, var))
 475                return -EINVAL;
 476
 477        if (check_only)
 478                return 0;
 479
 480        pinfo->vmode = vmode;
 481        pinfo->cmode = cmode;
 482        pinfo->xres = vmode_attrs[vmode-1].hres;
 483        pinfo->yres = vmode_attrs[vmode-1].vres;
 484        pinfo->xoffset = 0;
 485        pinfo->yoffset = 0;
 486        pinfo->vxres = pinfo->xres;
 487        pinfo->vyres = pinfo->yres;
 488        
 489        return 0;
 490}
 491
 492
 493/* 
 494 * Parse user specified options (`video=platinumfb:')
 495 */
 496static int __init platinumfb_setup(char *options)
 497{
 498        char *this_opt;
 499
 500        if (!options || !*options)
 501                return 0;
 502
 503        while ((this_opt = strsep(&options, ",")) != NULL) {
 504                if (!strncmp(this_opt, "vmode:", 6)) {
 505                        int vmode = simple_strtoul(this_opt+6, NULL, 0);
 506                        if (vmode > 0 && vmode <= VMODE_MAX)
 507                                default_vmode = vmode;
 508                } else if (!strncmp(this_opt, "cmode:", 6)) {
 509                        int depth = simple_strtoul(this_opt+6, NULL, 0);
 510                        switch (depth) {
 511                         case 0:
 512                         case 8:
 513                            default_cmode = CMODE_8;
 514                            break;
 515                         case 15:
 516                         case 16:
 517                            default_cmode = CMODE_16;
 518                            break;
 519                         case 24:
 520                         case 32:
 521                            default_cmode = CMODE_32;
 522                            break;
 523                        }
 524                }
 525        }
 526        return 0;
 527}
 528
 529#ifdef __powerpc__
 530#define invalidate_cache(addr) \
 531        asm volatile("eieio; dcbf 0,%1" \
 532        : "=m" (*(addr)) : "r" (addr) : "memory");
 533#else
 534#define invalidate_cache(addr)
 535#endif
 536
 537static int platinumfb_probe(struct platform_device* odev)
 538{
 539        struct device_node      *dp = odev->dev.of_node;
 540        struct fb_info          *info;
 541        struct fb_info_platinum *pinfo;
 542        volatile __u8           *fbuffer;
 543        int                     bank0, bank1, bank2, bank3, rc;
 544
 545        dev_info(&odev->dev, "Found Apple Platinum video hardware\n");
 546
 547        info = framebuffer_alloc(sizeof(*pinfo), &odev->dev);
 548        if (info == NULL) {
 549                dev_err(&odev->dev, "Failed to allocate fbdev !\n");
 550                return -ENOMEM;
 551        }
 552        pinfo = info->par;
 553
 554        if (of_address_to_resource(dp, 0, &pinfo->rsrc_reg) ||
 555            of_address_to_resource(dp, 1, &pinfo->rsrc_fb)) {
 556                dev_err(&odev->dev, "Can't get resources\n");
 557                framebuffer_release(info);
 558                return -ENXIO;
 559        }
 560        dev_dbg(&odev->dev, " registers  : 0x%llx...0x%llx\n",
 561                (unsigned long long)pinfo->rsrc_reg.start,
 562                (unsigned long long)pinfo->rsrc_reg.end);
 563        dev_dbg(&odev->dev, " framebuffer: 0x%llx...0x%llx\n",
 564                (unsigned long long)pinfo->rsrc_fb.start,
 565                (unsigned long long)pinfo->rsrc_fb.end);
 566
 567        /* Do not try to request register space, they overlap with the
 568         * northbridge and that can fail. Only request framebuffer
 569         */
 570        if (!request_mem_region(pinfo->rsrc_fb.start,
 571                                resource_size(&pinfo->rsrc_fb),
 572                                "platinumfb framebuffer")) {
 573                printk(KERN_ERR "platinumfb: Can't request framebuffer !\n");
 574                framebuffer_release(info);
 575                return -ENXIO;
 576        }
 577
 578        /* frame buffer - map only 4MB */
 579        pinfo->frame_buffer_phys = pinfo->rsrc_fb.start;
 580        pinfo->frame_buffer = __ioremap(pinfo->rsrc_fb.start, 0x400000,
 581                                        _PAGE_WRITETHRU);
 582        pinfo->base_frame_buffer = pinfo->frame_buffer;
 583
 584        /* registers */
 585        pinfo->platinum_regs_phys = pinfo->rsrc_reg.start;
 586        pinfo->platinum_regs = ioremap(pinfo->rsrc_reg.start, 0x1000);
 587
 588        pinfo->cmap_regs_phys = 0xf301b000;     /* XXX not in prom? */
 589        request_mem_region(pinfo->cmap_regs_phys, 0x1000, "platinumfb cmap");
 590        pinfo->cmap_regs = ioremap(pinfo->cmap_regs_phys, 0x1000);
 591
 592        /* Grok total video ram */
 593        out_be32(&pinfo->platinum_regs->reg[16].r, (unsigned)pinfo->frame_buffer_phys);
 594        out_be32(&pinfo->platinum_regs->reg[20].r, 0x1011);     /* select max vram */
 595        out_be32(&pinfo->platinum_regs->reg[24].r, 0);  /* switch in vram */
 596
 597        fbuffer = pinfo->base_frame_buffer;
 598        fbuffer[0x100000] = 0x34;
 599        fbuffer[0x100008] = 0x0;
 600        invalidate_cache(&fbuffer[0x100000]);
 601        fbuffer[0x200000] = 0x56;
 602        fbuffer[0x200008] = 0x0;
 603        invalidate_cache(&fbuffer[0x200000]);
 604        fbuffer[0x300000] = 0x78;
 605        fbuffer[0x300008] = 0x0;
 606        invalidate_cache(&fbuffer[0x300000]);
 607        bank0 = 1; /* builtin 1MB vram, always there */
 608        bank1 = fbuffer[0x100000] == 0x34;
 609        bank2 = fbuffer[0x200000] == 0x56;
 610        bank3 = fbuffer[0x300000] == 0x78;
 611        pinfo->total_vram = (bank0 + bank1 + bank2 + bank3) * 0x100000;
 612        printk(KERN_INFO "platinumfb: Total VRAM = %dMB (%d%d%d%d)\n",
 613               (unsigned int) (pinfo->total_vram / 1024 / 1024),
 614               bank3, bank2, bank1, bank0);
 615
 616        /*
 617         * Try to determine whether we have an old or a new DACula.
 618         */
 619        out_8(&pinfo->cmap_regs->addr, 0x40);
 620        pinfo->dactype = in_8(&pinfo->cmap_regs->d2);
 621        switch (pinfo->dactype) {
 622        case 0x3c:
 623                pinfo->clktype = 1;
 624                printk(KERN_INFO "platinumfb: DACula type 0x3c\n");
 625                break;
 626        case 0x84:
 627                pinfo->clktype = 0;
 628                printk(KERN_INFO "platinumfb: DACula type 0x84\n");
 629                break;
 630        default:
 631                pinfo->clktype = 0;
 632                printk(KERN_INFO "platinumfb: Unknown DACula type: %x\n", pinfo->dactype);
 633                break;
 634        }
 635        dev_set_drvdata(&odev->dev, info);
 636        
 637        rc = platinum_init_fb(info);
 638        if (rc != 0) {
 639                iounmap(pinfo->frame_buffer);
 640                iounmap(pinfo->platinum_regs);
 641                iounmap(pinfo->cmap_regs);
 642                dev_set_drvdata(&odev->dev, NULL);
 643                framebuffer_release(info);
 644        }
 645
 646        return rc;
 647}
 648
 649static int platinumfb_remove(struct platform_device* odev)
 650{
 651        struct fb_info          *info = dev_get_drvdata(&odev->dev);
 652        struct fb_info_platinum *pinfo = info->par;
 653        
 654        unregister_framebuffer (info);
 655        
 656        /* Unmap frame buffer and registers */
 657        iounmap(pinfo->frame_buffer);
 658        iounmap(pinfo->platinum_regs);
 659        iounmap(pinfo->cmap_regs);
 660
 661        release_mem_region(pinfo->rsrc_fb.start,
 662                           resource_size(&pinfo->rsrc_fb));
 663
 664        release_mem_region(pinfo->cmap_regs_phys, 0x1000);
 665
 666        framebuffer_release(info);
 667
 668        return 0;
 669}
 670
 671static struct of_device_id platinumfb_match[] = 
 672{
 673        {
 674        .name           = "platinum",
 675        },
 676        {},
 677};
 678
 679static struct platform_driver platinum_driver = 
 680{
 681        .driver = {
 682                .name = "platinumfb",
 683                .owner = THIS_MODULE,
 684                .of_match_table = platinumfb_match,
 685        },
 686        .probe          = platinumfb_probe,
 687        .remove         = platinumfb_remove,
 688};
 689
 690static int __init platinumfb_init(void)
 691{
 692#ifndef MODULE
 693        char *option = NULL;
 694
 695        if (fb_get_options("platinumfb", &option))
 696                return -ENODEV;
 697        platinumfb_setup(option);
 698#endif
 699        platform_driver_register(&platinum_driver);
 700
 701        return 0;
 702}
 703
 704static void __exit platinumfb_exit(void)
 705{
 706        platform_driver_unregister(&platinum_driver);
 707}
 708
 709MODULE_LICENSE("GPL");
 710MODULE_DESCRIPTION("framebuffer driver for Apple Platinum video");
 711module_init(platinumfb_init);
 712
 713#ifdef MODULE
 714module_exit(platinumfb_exit);
 715#endif
 716
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